Tape control for projectors



2 Sheets-Sheet 34. R F DlRKES ET AL TAPE CONTROL FOR PROJECTORS Aug. 7,

R.F. DIRKE'S Filed Aug. 1, 1931 c. I. ROBERTS ATTORNEY I Aug. 7, 1934.R. F. DIRKES ET AL 1,963,813 I TAPE CONTROL FOR PROJECTORS Filed Aug. 1,1931 2 Sheets-Shet 2 FIG. 2

INVENTOR$- R. F. DIRKES BY G. I. ROBERTS Patented Aug. 7, 1934 UNITEDSTATES PATENT OFFICE 1,968,818 TAPE CONTROL roa raomo'rons ApplicationAugust 1, 1931, Serial No. 554,574

1'1 Claims.

This invention relates to a telegraph printing and projecting system inwhich information printed upon a tape is projected upon a screen forobservation. More particularly the invention 5 relates to means forcontrolling the feeding of the a tape through the projector so that theprojected images will advance across the screen with an even movement sothat theymay be easily discerned.

Several projection systems are in general use in connection with stockor news items, the ticker printing the quotations or other items ofinformation upon a specially prepared tape from which they are projectedonto a screen for simultaneous observation by a large number of persons.

In order to eliminatea jerky motion of the projected' image, it is thepractice to employ a tape puller operated by an electric motor, whichdraws the'tape through the projector in a continuous 29 movement atsubstantially the speed at which the tape is ejected from the ticker. Alight leaf spring bears on the tape so that a loop is formed between theticker and the projector to absorb the jerky motion by which the tape isfed out of the ticker. A switch l ever having its free end restingin theloop controls the operation of the tape puller, either through contactsin the motor circuit or through a clutch intermediate the motor shaftand the tape puller, or in some other suitable manner.

At certain relative speeds of operation of the ticker and of the tapepuller, however, the switch lever may take a critical position withrelation to its contacts, so that the tape puller starts and 5 stops forsubstantially each character or small group of characters printed,thereby producing a jerky image on the screen.

In a co-pending application, Ser. No. 499,588,

filed December 2, 1930, of which the present application is acontinuation in part, we have disclosed means for eliminating thisdifficulty in accordance with which we operate the tape puller by acontinuously running motor'through a positive clutch, and disengage theclutch by means of 5 a magnet or other suitable device to stop theoperation of the tape puller. The circuit to the magnet is either openedor closed, to eflfect engagement of the clutch whenever a loop ofsumcient size has accumulated between the tape printer and theprojector. When the circuit has been conditioned so as to start the tapemoving through the projector, it cannot be altered to disengage theclutch until the loop of the tape has decreased to a size below that atwhich it caused engagement of the clutch, equivalent to a predeterminednumber of characters, as for instance five or six. Conversely, once thetape puller has been stopped it cannot be started again until the loopincreases in length an amount equivalent to said predetermined number ofcharacters. 50 One of the objects of the present invention is to.provide a tape puller having these same characteristics in which thepositive clutch is eliminated and the control ofthe tape obtained in amore simple and smoother manner.

Another object is to provide a tape puller employing a continuouslyoperating motor and. a slip or friction clutch in which the tape, afterit has been brought to rest will continue at rest until a predeterminedor measured amount of tape has again accumulated between the ticker andthe projector.

A further object is to control the speed of the tape puller inaccordance with the amount of accumulated tape ahead of the projector.

A still further object is to provide a tape puller arrangement for aticker tape projector in which there will be a minimum of interruptionsin the movement of the tape and in which the transition from onecondition of movement or rest to another will be effected gradually andsmoothly.

Other objects and advantages of the invention will hereinafter appear.

In accordancewith our present invention the tape is drawn through thefield of the projector by a constantly acting motor, the tape beingarrested, by a gripping or snubbing action on the tape, whenever theloop between the ticker and projector decreases to a predeterminedminimum. Preferably, we employ an electric motor operating through aslip clutch to pull the tape and control the speed of the motor by meansof appropriate resistances in'a'ccordance with the amount of unprojectedtape at any time. As long as the supply of unprojected tape exceeds adefinite amount, the motor is operated at full speed and as the supplydiminishes the speed of the motor is decreased. Consequently, with aslow market the average speed of the tape is reduced so that thequotations remain on the screen for a longer period and theinterruptions in the movement of the tape are less frequent. Due to theinertia of the motor armature changes from one speed to another occurgradually so that a smooth movement of the tape results. The speed ofthe motor may be varied by any number of increments but we have foundthat satisfactory control is obtained by employing two speeds only.

when the tape becomes taut, the tape snubthe tape but since the tape ismoving at relatively slow speed at this time the interruption is notsudden, as in the case of previous types of projectors in which the tapepuller operates at a speed slightly greater than the maximum speed ofthe ticker at all times.

After the tape has come to rest it is held stationary until apredetermined and appreciable amount of tape has again accumulatedbetween the ticker and the projector; Consequently, after movement ofthe tape again starts it will continue for a considerable nating theconstant starting and stopping of the ap ejecting the tape at a slowerrate than that at which the tape puller is capable of taking it up. Inorder that the invention may be more fully understood reference will behad to the accompanying drawings in which: I

Figure 1 is a front elevation of a tape pulling and control arrangementembodying our invention;

Fi ure 2 is a side elevation of mechanism;

Figure 3 is a perspective view of the tape guide; Figure 4'is a somewhatdiagrammatical view of a modified form of tape control mechanism; Figure5 illustrates a still further modification of the invention; and,

the tape pulling Figure 6 is a plan view of the modification shown inFigure 5.

Referring first to Figure 1, the tape which is contained upon a reel 10is fed through a ticker or other printing telegraph apparatusrepresented conventionally by the type wheel 11, platen 12 and feedrollers 13. The feed rollers serve to step the tape forwardintermittently as the printing occurs thereon. Obviously, any type oftape printer may be employed operated either by a uniform code, such asthe Baudot code, or by step-by-step signals. The tape is drawn through aguide 14 extending across the field of a projector, not shown, by meansof a tape puller indicated generally at 15, driven by an electric motor16 through a slip clutch which will be subsequently described. The tapeis rewound upon a reel at 17.

The tape puller 'is geared to operate at a maximum speed slightlygreater-than the maximum output of the printer and in order that themovement of the tape across the field of s the projector wilt be smooth,a loop 18 of tape is allowed to form between the printer and the guide14. The movement of the tape across the guide is controlled by the sizeof the loop 18 by means of an auto-control arm 19, pivoted at ,21 andhaving its depending end 22 resting in the loop of the tape. The arm 19moves between two electrical contacts 23 and 24. Whena loop ofsuflicient size occurs the arm 19 rests upon its lower contact 24, asshown.

For the purpose of arresting the movement 01' the tape when the loopdecreases to a minimum size we provide a snubbing arrangement comprisinga knurled stud 25, mounted upon a plate 26 carried in turn by the mainsupporting plate 27 of the control apparatus. A snubbing member 28,carried by 'a pin 29 journaled in the plate 27 is adapted to be movedinto engagement with the stud 25 to grip the tape therebetween. Thesnubbing member 28 is operated byan armature 31, rigid with the pin 29and disposed at the opposite or back side of the plate 27. The armature31 is movable period, thereby elimiwhich otherwise occurs when theticker is.

between two adjustable stops 32 and 33 by op-- positely disposedelectro-magnets 34 and 35. The armature is held in either set positionby means of a spring pressed jockey roller 36. The magnet 34 is includedin circuit with the lower contact 24 and the magnet 35 is in circuitwith the upper contact 23.

The motor 16 is operated from the power mains 37 through a resistance38. The resistance is short circuited through a pair. of contacts 39,whenever the loop of tape exceeds a definite size. These contacts areadapted to be opened by the upward movement of the auto-control arm ,19to include the resistance in the motor circuit and thereby. reduce thespeed of the motor.

The operation of the tape control mechanism is as follows. Assuming asufficient accumulation of tape to have occurred to enable theauto-control arm to rest on its lower contact 24, the magwill be closed,short-circuiting the resistance 38 and permitting the motor to operateat full speed. If the tape is supplied from the ticker at approximatelythe same speed as it is drawn across the field of the projector by thetape puller 15, the loop 18 will remain substantially constant and asteady movement of the tape will result. If the ticker operates slightlyslower than the tape puller,.which is the normal condition, the loop oftape will gradually decrease raising the auto-control arm untilitengages the contacts 39 to open the same, thereby including theresistance 38 in the motor circuitand decreasing the speed thereof. Thespeed of the motor may be decreased any desired amount but we have foundsatisfactory control to be obtained by reducing the speed about one-halfof its maximum speed. The tape does not immediately change its speed,however, due to the inertia of the motor armature but gradually assumesthe reduced speed. If the tape puller now operates at a slower rate thanthat at which the tape is ejected from the ticker, the loop 18 willagain increase permitting the contacts 39 to again close so as to againincrease the motor speed. By providing a relatively large difference inspeed of operation of the motor a considerable range in the speed ofoperation of the ticker is provided in which it may operate withouthaving the loop of tape reduced sufficient-'- 1y to render it necessaryto arrest its movement entirely. That is, the tape will alternatebetween high and low speed for a considerable range of speed of theticker.

However, should the ticker operate below the slowest speed of the tapepuller, the loop 18 will eventually be reduced suificiently to raise theauto-control arm 19 into engagement with its upper contact 23 at whichtime the upper magnet 35 will be energized attracting the armature 31,thereby moving the snubbing member 28 against the stud 25 and arrestingthe movement of the tape. -The snubbing member is locked in each setposition-by the jockey roller 36. Consequently, the tape remains at restuntil a new loop is formed sufficient to permit the auto-control arm toengage its lower contact 24 at which time the magnet 34 will beenergized again to release the tape. By delaying the movement of thetape until an appreciable quantity of tape has accumulated, frequentstarting and stopping or jerky movement of the tape is eliminated.

contained within a housing 44 by the electric motor 16. A roller 44mounted upon a pivoted arm 46 presses the tape against the feed roller41 by means of a spiral spring 4'7. The take-up reel 1'7 is operatedfrom the shaft 42 by means of a belt 48 extending around a pulley 49fixed to the shaft 42 and a second pulley 51 loosely mounted r upon theshaft 52 of the reel 1'7. The shaft 52 is driven from the pulley 51through a friction clutch 53. The tape passes from the guide 14, underan idler roller 54, thence between the rollers 41 and 44 and over asecond idler roller 55 to the reel 17. The tension of the frictionclutch 43 may be adjusted by the nut 56, acting on the spider springs5'7 so as to cause the tape to be drawn readily across the guide 14,when the gripping member 28 is disengaged from the tape. but to slipfreely when the member 28 is held in contact with the tape.

The friction clutch 53 controlling the reel 1'7 has a variable loadthereon, increasing as the diameter of the tape on the reel increases.Consequently, if the clutch is adjusted to carry the maximum loadimposed by a full reel, it may exert too strong a pull on the tape whenthe reel is empty, resulting in the dragging of the tape through thegripping members 25 and 28. To avoid this difficulty we provide acontrol mechanism for the reel 1'7 comprising a detent wheel 58, fixedto the shaft 52 to rotate with the reel and a detent lever 59 pivoted at60, and having one free end engaging the detent wheel and the other freeend extending across the path of the tape between the roller 55 and thereel 1'7. The detent 'lever is held out of contact with the wheel'58 byalight spring 70. However, when the tape between the roller 55 and thereel-becomes taut, the detent is forced into engagement with the detentwheel locking the reel against further movement.

The tape guide 14 is shown in Figure 3 as comprising a lower rectangularframe 61 having its inner edges rabbeted or grooved as at 62, and anupper rectangular frame 63 having a downwardly extending flange 64,engaging in the rabbet but spaced from the lower wall thereof so as toprovide a groove 65 adapted to engage the -margins only of the tape toguide the same across the field of the projector. The groove 65 has aheight somewhat greater than the thickness of the transparent tape sothat the tape passes loosely therethrough. This feature is ofconsiderable importance sincewith the usual type of support for thetape, the tape is engaged either at its margin or along its centerportion by the usual J-spring or similar device for holding the tapefirmly down on to the support. These tape engaging devices mark the tapeand in the case of translucent paper tapes, they tend to cause the tapeto tear, particularly if weak spots occur therein. Moreover, dust andlint are scrapped from the tape by these engaging devices and accumulatethereat, breaking loose from time to time and moving across the fleld ofthe projector in tufts and producing an unsightly appearance on thescreen. By spacing the upperframe 63 slightly above the, tape, thisdefect is entirely avoided and at the same time there is no tendency forthe tape to buckle or wrinkle across the field of the projector. Theupper frame 63 may rest lightly in the lower frame and may be readilygrip the tape. After the rollers have once been "the movement of thetape has started and the removed therefrom when it is necessary toinsert a new reel of tape therein.

We have shown in Figure 4 a modified form of tape gripper comprising aseries of'links, 66, 6'7 and 68, links 66 and 68 being pivoted at 69 and'71 respectively, to a plate '72, and having the 'link 67 pivoted totheir free ends.

A tape gripping roller 73 is mounted upon the link 66 and a cooperatinggripping stud '74 is carried by the link 67. The tape passes frombeneath the type wheel 11 over a roller '75, beneath the auto stop arm19 and between the roller '73 and stud- '74 and thence across the tapesupport 14. When the tape loop 18 is of sufficient size to permit thecontrol arm 19 to rest on its lower contact 24, the magnet '75 isenergized, attracting the link 6'7, drawing the same down so as to widenthe angle between the links 66 and 67, thereby moving the grippingroller"73 and stud '74 out of contact with each other and releasing thetape so that it may be drawn freely across the field of the projector.

As the tape loop decreases in size it effects an upward pull on theroller '73, raising the link 66 and with it the link 6'7, therebydecreasing the angle between the same and eventuallybringing the roller'73 and stud '74 again into contact to brought into gripping relationwith the tape they are definitely held incontact by the tension appliedto the tape irrespective of the amount of slack tape accumulating to theleft thereof ,so that once the tape has been brought to rest it will notbe .again set in motion until it is of such a size as to permit thecontrol arm 19 to engage its lower contact 24 and energize the magnet'75 to again pull the link 6'7 downward. It will be understood, ofcourse, that the auxiliary contacts 39 of Figure 1, for controlling themotor circuit, may also be employed in the embodiment of Figure 4.

In Figures 5 and 6 we have shown a still further modification in whichthe motion of the tape is arrested by the gripping action of a roller7'7 and a cooperating fixed roller '76. The roller '76 is carried on ashaft '78, extending from the frame member '79 (Figure 6) and roller '77is rigidly mounted upon an arm -81, pivoted on the shaft 82. It is urgedtowards the roller '76 into contact with the tape by a coiled spring 83and is adapted to be held out of contact with the tape by anelectro-magnet 84. The tape lever 19 is also mounted upon the shaft 82and plays be-- tween the upper and lowercontacts 23 and 24 respectively,which control the operation of a biased polar relay 85. The relayoperates to energize the magnet 84 when a. loop of tape of apredetermined size forms, thereby separating the rollers '76 and '77 topermit the tape to be drawn through the field of the projector by thetape pulling mechanism; The lever 19 is shown in Figure 5 approachingits lower contact just prior to disengaging the gripping rollers 76 and'77. After loop again decreased suificiently to raise the lever 19 intoengagement with its upper. contact 23, relay 85 operates to its oppositeside, deenergizing the magnet 84 and permitting the roller '76 to belifted into engagement with the roller '7'? to grip the tapetherebetween and arrest its movement.

Obviously numerous other modifications of the invention will occur tothose skilled in the art and, therefore,

we do not desire to be limited to Y movable away from the tape to permitfree movement thereof over said support and being movable against thetape to stop the motion thereof across the support, when there is apredetermined minimum length of tape between said printing apparatus andsupport, and means for maintaining said gripping means in engagementwith the tape until a length of tape, corresponding to apredeterminedplural number of characters, has been ejected by saidiprintingapparatus.

2. In combination, a telegraph printing apparatus adapted to eject tapetherefrom, a support, a tape puller for moving said tape across thesupport, tape engaging means operable to grip the tape to arrest itsmotion when there is a predetermined amount of tape between the printingapparatus and support, and electro-magnetic means for releasing the tapeafter a predetermined length thereof, corresponding to a plural numberof characters, has been ejected by the printing apparatus.

3. In combination, a tape supply, a support, a tape puller for movingsaid tape across said support, means for forming a loop of tape betweensaid tape supply and support, a tape engaging device adapted to moveinto position to grip the tape, to arrest its movement when said loopdecreases to a predetermined minimum size and to move into position torelease the tape when the loop increases to a predetermined larger sizeand means for locking the tape engaging device in one or the other ofsaid positions when the loop is of an intermediate size.

4. In combination, a tape supply, a support, a tape puller for movingsaid tape across said support, means for forming a loop of tape betweensaid tape supply and support, a tape engaging device, electromagneticmeans adapted to move said't ape engaging device into position to gripthe tape, to arrest its movement when said loop decreases to apredetermined minimum'size, and into position to release the tape whenthe loop increases to a predetermined larger size and means for lockingthe tape engaging device in one or the other of said positions when theloop is of an intermediate size.

5. In combination, a telegraph printing apparatus adapted to eject tapetherefrom, a support, atape puller for moving said tape across saidsupport, means for forming a loop of tape between said printingapparatus and support, an arm riding in said loop and having upper andlower limits of movement, corresponding to a difference in the length ofthe loop of several characters, a tape gripping device movable intoengagement with the tape to arrest its movement when the arm is in itsupper limit and means for maintaining said gripping device in engagementwith the tape to hold the tape at rest until said ar reaches its lowerlimit of movement.

6. In combination, a telegraph printing apparatus adapted to eject tapetherefrom, a support, a tape puller for moving said tape across saidsupport, means for forming a loop of tape between said printingapparatus and support, an arm riding in said loop and having upper andlower contacts, corresponding to a diiference in the length of the loopof several characters, a tape arresting device, oppositely disposedmagnets arranged to move said tape arresting device into and out ofengagement with the tape when said arm is on its upper and lowercontacts respectively and means for maintaining said tape arrestingdevice in its previously set position when the contact arm is betweenits contacts.

7. In combination, a tape supply,-a support, a

port, means for forming a loop of tape between said tape supply andsupport, a tape arresting device, oppositely disposed magnets having acommon armature adapted to move said tape arresting device into and outof engagement with the tape when said loop varies'between predeterminedlimits and means for holding said armature in its previously setposition when said loop is of an intermediate size.

9. In combination, a source of tape, a tape support, a tape puller,means for operating said tape puller at one speed when a predeterminedamount of tape forms between the source and support, and means foroperating said tape puller at an appreciably lower speed when the tapebetween the source and support decreases to a predetermined amount,means to arrest the movement of the tape when the tape between thesource and support decreases to a still smaller amount and means formaintaining said tape at rest until an appreciable amount'thereofcorresponding to a plurality of characters again accumulates between thesource and support.

10. In combination, a source of tape, a tape support, a tape puller,means for permitting a loop of tape to form between the source andsupport, an arm riding in said loop, having two limiting positions sospaced as to correspond to a diiference of several characters in theloop of tape, means for arresting the movement of the tape when the armis one limiting position, means for releasing the tape when it is in theother limiting position and means for reducing the speed of the tapewhen the arm is in an intermediate position.

11. In combination, a source of tape, a tape support, a tape puller,means for permitting a loop of tape to form between the source andsupport, an arm riding in said loop having upper and lower contacts inits two limiting positions, means in circuit with the upper contact forarresting the movement of the tape when the arm is in its upperposition, means in circuit with the lower contact for releasing the tapewhen the arm is in its lower position and an auxiliary contact forreducing the speed of the tape when the arm is in an intermediateposition.

12. In combination, a source of tape, a support, a tape puller, a tapegripping device movable into contact with the tape when said tapebecomes taut between the source and support, for arresting the movementof the tape, said gripping device maintaining the tape at rest by thetension ap- L plied by-the tape puller untila predetermined amount oftape has been released from said source. I

- 13. In combination, a source of tape, a support, a tape puller, tapearresting means comprising a pair of links, a tape gripping devicecarried by each of said links, the links being interconnected so that asone is moved, the tape gripping devices are brought together, said tapepassing between the gripping devices and being arranged to move one ofsaid links, as the tape between the source and support becomes taut tomove the gripping devices into contact with the tape to arrest themovement thereof.

14. In combination, a source of tape, a support, a tape puller, tapearresting means comprising a pair of links, a tape gripping devicecarried by each of said links, the links being interconnected so that asone is moved, the tape gripping devices are brought together, said tapepassing between the gripping devices and being arranged to move one ofsaid links, as the tape between the source and supportbecomes taut, tomove the gripping devices into contact with the tape to arrest themovement thereof, said gripping devices being held in engagement withthe tape by the tension of said tape puller independently of thetautness of the tape between the source and support and means controlledby an accumulation of tape between the source and support for releasingsaid gripping devices.

15. In combination, a source of tape, a support, a tape puller, tapearresting means comprising a pair of links, a tape gripping devicecarried by each of said links, the links being interconnected so that asone is moved, the tape gripping devices are brought together, said tapepassing between the gripping devices and being arranged to moveDISOLAlMER 1,968,818. Robert F. Dirkes, Jamaica, and

TAPE CONTROL FOR PROJECTORS.

one of said links, as the tape between the source and support becomestaut, to move the gripping devices into contact with the tape to arrestthe movement thereof,- said gripping devices being held in engagementwith the tape by the tension of said tape puller independently of thetautness of the tape between the source and support and meansindependent of 'said gripping devices for releasing the same. A

16. In combination, a source of tape, a tape support, a tape puller,means for permitting a loop of tape varying in length between two limitsto form between the source and the support, means for arresting themovement of the tape when the length of the loop has reached onelimiting position, means for releasing the tape when it has reached theother limiting position and means for reducing the speed of the tapewhen it reaches a certain intermediate position.

' 17. In combination, a source of tape, a tape support, a tape puller,means for permitting a loop of tape having a length varying between twolimits corresponding to a difference of several characters in the tape,to form between the source and the support, means disposed between thesource andthe support acting to arrest the tape when the length of theloop has reached one limiting position and acting, to release the tapewhen the length of the loop has reached the other limiting position.

ROBERT F. DIRKES. GEORGE I. ROBERTS.

George I. Roberts, New York, N. Patent dated August 7, 1934. DIS-claimer filed August 3, 1938, by the assignee, The Western UnionTelegraph Company.

Hereby enters this disclaimer to claims 2 and 9 of said Letters Patent.

[Ofiic'ial Gazette Aagnst'30, 1938.]

pair of links, a tape gripping device carried by each of said links, thelinks being interconnected so that as one is moved, the tape grippingdevices are brought together, said tape passing between the grippingdevices and being arranged to move one of said links, as the tapebetween the source and support becomes taut to move the gripping devicesinto contact with the tape to arrest the movement thereof.

14. In combination, a source of tape, a support, a tape puller, tapearresting means comprising a pair of links, a tape gripping devicecarried by each of said links, the links being interconnected so that asone is moved, the tape gripping devices are brought together, said tapepassing between the gripping devices and being arranged to move one ofsaid links, as the tape between the source and supportbecomes taut, tomove the gripping devices into contact with the tape to arrest themovement thereof, said gripping devices being held in engagement withthe tape by the tension of said tape puller independently of thetautness of the tape between the source and support and means controlledby an accumulation of tape between the source and support for releasingsaid gripping devices.

15. In combination, a source of tape, a support, a tape puller, tapearresting means comprising a pair of links, a tape gripping devicecarried by each of said links, the links being interconnected so that asone is moved, the tape gripping devices are brought together, said tapepassing between the gripping devices and being arranged to moveDISOLAlMER 1,968,818. Robert F. Dirkes, Jamaica, and

TAPE CONTROL FOR PROJECTORS.

one of said links, as the tape between the source and support becomestaut, to move the gripping devices into contact with the tape to arrestthe movement thereof,- said gripping devices being held in engagementwith the tape by the tension of said tape puller independently of thetautness of the tape between the source and support and meansindependent of 'said gripping devices for releasing the same. A

16. In combination, a source of tape, a tape support, a tape puller,means for permitting a loop of tape varying in length between two limitsto form between the source and the support, means for arresting themovement of the tape when the length of the loop has reached onelimiting position, means for releasing the tape when it has reached theother limiting position and means for reducing the speed of the tapewhen it reaches a certain intermediate position.

' 17. In combination, a source of tape, a tape support, a tape puller,means for permitting a loop of tape having a length varying between twolimits corresponding to a difference of several characters in the tape,to form between the source and the support, means disposed between thesource andthe support acting to arrest the tape when the length of theloop has reached one limiting position and acting, to release the tapewhen the length of the loop has reached the other limiting position.

ROBERT F. DIRKES. GEORGE I. ROBERTS.

George I. Roberts, New York, N. Patent dated August 7, 1934. DIS-claimer filed August 3, 1938, by the assignee, The Western UnionTelegraph Company.

Hereby enters this disclaimer to claims 2 and 9 of said Letters Patent.

[Ofiic'ial Gazette Aagnst'30, 1938.]

